**Question:** In Turner's syndrome which of the following is NOT seen:

A. Short stature
B. Oligomenorrhea or amenorrhea
C. Hypothyroidism
D. Hypogonadism

**Correct Answer:** **Hypogonadism**

**Core Concept:** Turner's syndrome is a genetic disorder characterized by partial or complete deletion of one X chromosome in females. It results in a range of clinical features, primarily affecting growth and development.

**Why the Correct Answer is Right:** Hypogonadism is a condition characterized by insufficient production of sex hormones (estrogen and testosterone) by the gonads (ovaries in females and testes in males). In Turner's syndrome, the affected individuals have underdeveloped ovaries and testes due to the genetic abnormality. As a result, they do not produce sufficient levels of sex hormones, leading to the clinical manifestations typically observed in Turner's syndrome, such as short stature, oligomenorrhea or amenorrhea, and hypothyroidism.

**Why Each Wrong Option is Incorrect:**

A. Short stature: Turner's syndrome is indeed associated with short stature as a result of delayed or incomplete growth and development due to hormonal imbalances.
B. Oligomenorrhea or amenorrhea: These symptoms are present in Turner's syndrome due to the absence of menstruation in affected females, caused by the hormonal imbalances.
C. Hypothyroidism: Hypothyroidism is observed in Turner's syndrome due to the involvement of the pituitary-hypothalamic-thyroid axis, leading to decreased thyroid hormone production and resulting in the characteristic clinical features.

**Clinical Pearl:** Turner's syndrome is a reminder of the importance of considering genetic causes of hormonal imbalances in females with infertility, short stature, and other developmental issues. Early diagnosis and management can improve the quality of life and prevent complications in affected individuals.